Interface Folding

interface Folding {
    addFold(placeholder: string | Fold, range?: Range): Fold;
    addFolds(folds: Fold[]): void;
    expandFold(fold: Fold): void;
    expandFolds(folds: Fold[]): void;
    foldAll(startRow?: number, endRow?: number, depth?: number): void;
    getAllFolds(): Fold[];
    getCommentFoldRange(
        row: number,
        column: number,
        dir: number,
    ): Range | undefined;
    getDisplayLine(
        row: number,
        endColumn: number | null,
        startRow: number | null,
        startColumn: number | null,
    ): string;
    getFoldAt(row: number, column: number, side: number): Fold;
    getFoldDisplayLine(
        foldLine: FoldLine,
        endRow: number | null,
        endColumn: number | null,
        startRow: number | null,
        startColumn: number | null,
    ): string;
    getFoldedRowCount(first: number, last: number): number;
    getFoldLine(docRow: number, startFoldLine?: FoldLine): FoldLine | null;
    getFoldRowEnd(docRow: number, startFoldRow?: FoldLine): number;
    getFoldRowStart(docRow: number, startFoldRow?: FoldLine): number;
    getFoldsInRange(range: Range): Fold[];
    getFoldsInRangeList(ranges: Range[]): Fold[];
    getFoldStringAt(
        row: number,
        column: number,
        trim?: number,
        foldLine?: FoldLine,
    ): string | null;
    getNextFoldLine(docRow: number, startFoldLine?: FoldLine): FoldLine | null;
    getParentFoldRangeData(
        row: number,
        ignoreCurrent?: boolean,
    ): { firstRange: Range; range?: Range };
    isRowFolded(docRow: number, startFoldRow?: FoldLine): boolean;
    removeFold(fold: Fold): void;
    removeFolds(folds: Fold[]): void;
    setFoldStyle(style: string): void;
    toggleFold(tryToUnfold?: boolean): void;
    toggleFoldWidget(toggleParent?: boolean): void;
    unfold(
        location: number | Point | Range | null,
        expandInner?: boolean,
    ): Fold[] | undefined;
    updateFoldWidgets(delta: Delta): void;
}